snarg53

I found that it was a plugin called Softaculous Pro that was causing the problem. Removed that and all is working fine. Thanks

Scratch that about Site Language. Drag and Drop in WP Forms only works when WP Debugging is activated!

I had exactly the same problem and used WP Debugging to determine that it was because I had selected a Site language of English (UK) rather than English (United States) in my WP Settings. As soon as I reset to the English (United States) all worked fine!